Two Dimensional Multigap Superconductivity in Bulk 2H-TaSSe

TL;DR

This study reveals that bulk 2H-TaSeS exhibits multigap anisotropic superconductivity with two-dimensional characteristics, surpassing Pauli limits in critical fields, based on comprehensive magnetization, transport, and specific heat measurements.

Contribution

It provides the first detailed experimental evidence of multigap anisotropic and two-dimensional superconductivity in bulk 2H-TaSeS, expanding understanding of topological superconductor candidates.

Findings

Multigap anisotropic superconductivity observed

Upper critical field exceeds Pauli limit

2D superconducting behavior in bulk crystal

Abstract

Superconducting transition metal dichalcogenides emerged as a prime candidate for topological superconductivity. This work presents a detailed investigation of superconducting and transport properties on 2H-TaSeS single crystals using magnetization, transport, and specific heat measurements. These measurements suggest multigap anisotropic superconductivity with the upper critical field, breaking Pauli limiting field in both in-plane and out-of-plane directions. The angle dependence of the upper critical field suggests 2-dimensional superconducting nature in bulk 2H- TaSeS.